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- Detection and Recognition of Helicopter Acoustic Signal 直升机声信号的检测和识别
- helicopter acoustic signal 直升机声信号
- Audio signal acquisition procedures, can show a number of acoustic signals. 音频信号采集用程序，可以显示多个声波信号。
- The relationship between acoustic signal frequency and beam diamter, which is inconsistent with the results of work[7. 8],is meassured to be f= Cs/2d. 声信号频率与束直径的关系为f=(C_s)/(2d),它不同于工作的结果。
- Acoustic signal is stability and accuracy , so using acoustic signal to classify objects can expand the field of pattern recognition . 声信号具有稳定、精确的特点,使用声信号作为目标分类可以使模式识别的领域大大的拓宽。
- The results show that the main frequency of the acoustic signal increases with the shape change of the ripple spring located under the slot wedge. 研究表明在波纹板的弹性范围内,随着波纹板形变量的加大,测得的声信号能量谱图中主频率值逐渐增加。
- The pressure acoustic signal generated by the cavitation bubble was detected with the high-frequency measuring hydrophone. 实验表明：激光空泡的特征与水动力空化空泡相似；
- In acoustic signal processing,it is valuable to determine whether a real room acoustic system is nonlinear deterministic. 实际房间声学系统是否具有非线性确定性是声学信号处理中值得研究的问题。
- Helicopter Acoustic Processing System 直升机声音处理系统
- In this paper, the acoustic signals of FBC is studied with chaotic theory. 本文应用混沌理论对燃煤流化床燃烧产生的声波信号进行了研究。
- The underwater acoustic signal can cause surface wave motion at the water-air interface and hence modulate the magnitude of the laser beam falling on the water surface. 水下声信号在水-空气界面会引起表面波动而对打在水表面的激光进行调制。
- The underwater acoustic signal can cause surface wave motion at water-air interface and modulate the magnitude of the laser beam falling on the water surface. 水下声信号在水-空气界面会引起表面波动而对打在水表面处的激光束进行幅度调制。
- It is realizable for the unit to pick up acoustic signal of different frequencies in a severe noisy background and single chip programmable shift and magnific. 可以实现在较大的背景噪声中提取不同频率的水声信号,在水声信号处理上使用了单片机程控换档放大,使之灵活。
- It is convenient to use the virtual instrument for data acquisition and analysis of the underwater acoustic signal,and help us to determine the structure and the arit... 利用虚拟仪器方便地实现了对水声信号的采集、处理,以及对水下目标测量时,为传感器结构和算法的确定提供参考。
- The underwater acoustic signal is the main information for the underwater detection and identification system, so it is very important to get the acoustic signal efficiently. 摘要水下声信号是水下探测系统实现对水中目标远程探测识别的主要信息之一，有效获取水下声信号是一个十分重要的问题。
- This paper proposes a novel method for detecting gas leakage from cracks in pipes using acoustic signal power spectrum analysis and clustering support vector machine(CSVM). 本文提出了一种基于声学信号功率谱分析和聚类支持向量机的检测管道损坏导致气体泄漏的新方法。
- The system can acquire, store and process muti-channel underwater acoustic signal and meet the design factors such as speed, accuracy, and power dissipation. 可同步采集存储和处理多路水下信号，系统速度、功耗、精度都满足水声探测系统的要求。
- The shipwrecked sailors were rescued by helicopter. 遭遇海难的水手已经被直升机救起。
- The helicopter had off when we got here. 当我们到达时,直升机已经起飞了。
- An examination of acoustic signaling systems among mammals gives us some scanty clues. 检视哺乳类动物的听觉传讯系统可以得到一些蛛丝马迹。
